Which structure of the respiratory system allows for gas exchange?

Mitosis starts and ends with diploid cells. That means they have two sets of chromosomes (both parents each contribute a set). In humans, how many chromosomes should be in each of these diploid cells after mitosis?

Initiating an action potential works best at short distances. (a) True (b) False

Avery's experiments showed that bacteria are transformed by a. RNA. c. proteins. b. DNA. d. carbohydrates.

The plant life cycle has mitosis occurring in spores, produced by meiosis, that germinate into the gametophyte phase. A. true B. False

46 chromosomes blank human gets blank from each parent

Malignant tumors are classified according to A. how quickly they divide. B. how quickly they spread. C. the type of cells that give rise to them. D. the type of cells they are most likely to spread to.

Which of the following statements is TRUE about vitamin and minerals? a. Vitamin D is a water-soluble vitamin that is stored as hydroxycholecalciferol and released so that bones and teeth form normally. b.

A blank reaction occurs when ionic or comment bond are broken and elements ions or simpler molecules are formed

The phase in which DNA copies itself

Which statement best describes the results of DNA A. Two identical DNA molecules B. one DNA molecule C. messenger RNA D. Two genetically different DNA molecules